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Re: Genes show Neoaves branching before K/Pg extinction

That's beside the point; those  who do still don't care. It's clear
> from the recent papers that most authors want to treat _Ratitae_ as a
> group that can be either monophyletic or non-monophyletic, so forcing
> them to be monophyletic by definition (even when it entails a severe
> violation of the traditional content of the group) isn't very
> helpful.

The definition Mike Keesey suggested would make Ratitae either monophyletic or _inexistent_ depending on the topology.